Its seems as though Cisco in their wisdom have
changed how the power levels are reported for optical SFP’s and
they now by default report in mW and not dBm on the ASR9k
platform. When observium SNMP’s them its pulling the mW values
now and thus its throwing the sensor values off and creating
alerts.
Can observium be made to change these back to dBm
readings using a simple calculation and pull the thresholds as
well as before? Calculation: P(dBm) = 10 ⋅ log10( P(mW) / 1mW)
This is whats seen on the CLI for the exact same
port:
Thresholds:
Alarm High Warning High
Warning Low Alarm Low
Temperature: +95.000 C +90.000 C
-20.000 C -25.000 C
Voltage: 3.800 Volt 3.700 Volt
2.900 Volt 2.800 Volt
Bias: 90.000 mAmps 80.000 mAmps
3.000 mAmps 2.000 mAmps
Transmit
Power: 1.59000 mW (2.01397 dBm) 1.26000 mW (1.00371 dBm)
0.20000 mW (-6.98970 dBm) 0.16000 mW (-7.95880 dBm)
Receive
Power: 1.26000 mW (1.00371 dBm) 1.00000 mW (0.00000 dBm)
0.01260 mW (-18.99629 dBm) 0.01000 mW (-20.00000 dBm)
Temperature:
30.434
Voltage:
3.264 Volt
Tx Bias:
33.722 mAmps
Tx Power:
0.53550 mW (-2.71241 dBm)
Rx Power:
0.22890 mW (-6.40354 dBm)
Many Thanks
Richard
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